1286745-06-9Relevant academic research and scientific papers
Synthesis of diphenyl(X)phosphonium betaines (X = CH3, C 6H5, 2,5-F2C6H3) from hexafluoro-1,4-naphthoquinone
Goryunov, Leonid I.,Zhivetyeva, Svetlana I.,Nevinsky, Georgy A.,Shteingartsa, Vitalij D.
experimental part, p. 185 - 191 (2011/06/22)
Betaines 5,6,7,8-tetrafluoro-3-(triphenyl-λ5- phosphanylidene)-1,2,3,4-tetrahydronaphthalene-1,2,4-trione, 5,6,7,8-tetrafluoro-3-(methyldiphenyl-λ5-phosphanylidene)-1,2, 3,4-tetrahydronaphthalene-1,2,4-trione, and 3-[(2,5-difluorophenyl)diphenyl- λ5-phosphanylidene]-5,6,7,8-tetrafluoro-1,2,3, 4-tetrahydronaphthalene-1,2, 4-trione have been synthesized via fluorine substitution in the quinone ring of hexafluoro-1,4-naphthoquinone by tertiary phosphines RPh2? (R = , Ph, 2,5-F2C6H 3) and methanol in 90, 30 and 62% yields, respectively. The first naphthalenetrione formed also upon interaction of pentafluoro-1,4-naphthoquinone with triphenylphosphine in methanol. The new 1,4-dibenzodioxine derivative - 6,11-difluoro-9-(triphenyl-λ5-phosphanylidene)-7,8,9, 10-tetrahydro-5,12-dioxatetracene-7,8,10-trione - has been obtained in a 83% yield by fluorine substitution in the benzene moiety of a naphthoquinone skeleton of this betaine by the action of pyrocatechol at the presence of potassium carbonate in DMSO. ARKAT-USA, Inc.
